D17 IV overhaul kit

An AGCO "170" motor kit.

An AGCO kit is 4 inch bore and 8.0 to 1 compression ratio....all after market 4 1/8" bore are less compression.

D17brown, where or who do I contact?  Thanks! Craig

Call Bill, Brenda, or Betty at Sandy Lake Imp. I would go with the 170 kit. The aftermarket over bore kits give a WD45 compression ratio so I'm told.

Thanks for all the input guys!  Craig

I remember having this discussion some years ago. I'd go with the 170 kit. The higher compression will get you more than the 1/8" overbore but I couldn't convince a few here back then.

Could this kit be used in a wd-45 ?

Kit could be used in a WD45 ( won't be able to start it without 12 volts and will stress the crankshaft for hard farming use) and a 170 camshaft grind is the SAME as a D17.....175 cam had a different grind for more valve lift.

Compression ratio on WD45 is 6.5 to 1..........D17 is 7.25 to 1......170 is 8.0 to 1......all run on regular gas and the D17 and 170 are timed at 25 degrees BTDC at full throttle where the WD45 is 30 degrees BTDC.  I'd run 89 octane if it was mine, but no need for any better than that.

Yes....good luck finding one.

I put a 175 kit (8.25:1) in brother's D17 back about a dozen years ago. Worked great. At D17 rpm of 1650 it dynoed at 56 HP before a complete break in period. Never had it on a dyno since cause he after a year or so dropped in a hopped up E engine to satisfy his pulling fever. Thing is after he did that he never pulled it for lack of time but before with the 175 kit he trophied all the time. That was a fun project, we just made our own jig to weld H Farmall top half of connecting rods to the bottom end of the D17 connecting rods. Made the jig by eyeball work only. Then attached Chevy 350 4" bore pistons to them. Compression was so high that on pump gas when you'd shut off the key switch it would make no difference as the engine would run and sound like it did with the switch on. Brother then got nervous and pulled the coil wire which did nothing. Had to shut off the gas. Bought airplane fuel and that did the trick. That thing really cackled loud with the 3" straight pipe he put on. Only cost were a gasket kit, used connecting rods and new 350 pistons. We just reused the old bearing as they looked good. Still has the engine on the shelf and we just talked about dropping it in a WD and to actually see how long it holds together if we go pulling it. OK I veered of a little.

Edited by Lonn - 08 Sep 2010 at 7:31am

Almost...8 to 1 on all 170's and 8.25 to 1 on the 175's.....the 8.25 to 1 compression caused the ignition timing to be set back to 23 degrees BTDC versus 25 degrees BTDC due to detonation issues.